travis-ci: update to Ubuntu Focal

Update to Ubuntu Focal 20.04.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

travis-ci/managers/debian.sh

@@ -31,6 +31,18 @@ for phase in "${PHASES[@]}"; do
             info "Setup phase"
             info "Using Debian $DEBIAN_RELEASE"
 
+	    # Install Docker Engine
+            sudo apt-get update
+            sudo apt-get install \
+                apt-transport-https \
+                ca-certificates \
+                curl \
+                gnupg-agent \
+                software-properties-common
+            curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+            sudo add-apt-repository \
+                "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+            sudo apt-get update
             sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
             docker --version
 

travis-ci/managers/ubuntu.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -eux
 
-RELEASE="bionic"
+RELEASE="focal"
 
 echo "deb-src http://archive.ubuntu.com/ubuntu/ $RELEASE main restricted universe multiverse" >>/etc/apt/sources.list
 

travis-ci/vmtest/run_vmtest.sh

@@ -15,7 +15,7 @@ ${VMTEST_ROOT}/build_pahole.sh travis-ci/vmtest/pahole
 travis_fold start install_clang "Installing Clang/LLVM"
 
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-sudo add-apt-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic main"
+sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main"
 sudo apt-get update
 sudo apt-get install -y clang-13 lld-13 llvm-13